"But I personally don't know where I stand in the whole, you know, imposing one's concept of right and wrong onto wholly different cultures and I understand why some countries would opt not to sign it"

While cultural relativism is a good thing, this is like saying "Well, I don't want to impose the basic dignity of equal human rights unto countries where honour killings of women are accepted, etc."

Because as much as we need to move away from ethnocentrism, etc., that doesn't mean supporting equal rights for all people is cultural imperialism.